3. slope is 7 (slope = rise/run) count from the left most point to the other
up 7 right 1 both positive so slope = 7/1 reduced is 7
4. slope is 1/3 same process as above
up 1 right 3 both positive movement so slope is 1/3
5. y = 1/3x - 4 slope intercept form is y = (slope)x + (y-intercept)
y-intercept is where the graph touches the y-axis
6. y = 3x + 4
